Author(s)

Arnoud Apituley, Sietse Stellinga and Hugo De Backer

Abstract

Time Series of Ozone in the Free Troposphere Measured by Lidar A contribution to subproject TOR-2 Arnoud Apituley*, Sietse Stellinga^ and Hugo De Backer^ * National Institute of Public Health and the Environment (RIVM), P.O.Box I, NL-3720BABilthoven, The Netherlands ^VrijeUniversitteit Amsterdam (VU), deBoelelaan 1081, 1081 HVAmsterdam, The Netherlands * Royal Meteorological Institute (KMI), Ringlaan 3, B-1180 Brussels, Belgium Introduction Routine observations of ozone vertical distributions in the free troposphere are made in Bilthoven (52°07' N, 5°12' E) by differential absorption lidar (Sunesson et al, 1994, Apituley et a/., 1997). A measurement scheme of one to two ozone profiles per week has been established since October 1994. The lidar technique for ozone measurements has advantages over some other methods, mainly due to the attainable high temporal and

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